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                                                                    EXHIBIT 10.3

                       VOLTERRA SEMICONDUCTOR CORPORATION

                             1996 STOCK OPTION PLAN


                            ADOPTED OCTOBER 29, 1996
               ADOPTION APPROVED BY STOCKHOLDERS OCTOBER 29, 1996
                       AMENDED AND RESTATED JULY 31, 1997
       AMENDMENT AND RESTATEMENT APPROVED BY STOCKHOLDERS AUGUST 27, 1997
                      AMENDED AND RESTATED DECEMBER 4, 1997
      AMENDMENT AND RESTATEMENT APPROVED BY STOCKHOLDERS DECEMBER 16, 1997
                       AMENDED AND RESTATED JULY 17, 1998
         AMENDMENT AND RESTATEMENT APPROVED BY STOCKHOLDERS JULY 3, 1998
                       AMENDED AND RESTATED APRIL 24, 1999
        AMENDMENT AND RESTATEMENT APPROVED BY STOCKHOLDERS MARCH 1, 1999
                      AMENDED AND RESTATED OCTOBER 6, 1999
       AMENDMENT AND RESTATEMENT APPROVED BY STOCKHOLDERS OCTOBER 6, 1999
                      AMENDED AND RESTATED OCTOBER 12, 2000
                     AMENDED AND RESTATED NOVEMBER 30, 2000
      AMENDMENT AND RESTATEMENT APPROVED BY STOCKHOLDERS SEPTEMBER 27, 2001
                       AMENDED AND RESTATED JULY 23, 2002
        AMENDMENT AND RESTATEMENT APPROVED BY STOCKHOLDERS MARCH 27, 2003
                     AMENDED AND RESTATED APRIL 20, 2004
        AMENDMENT AND RESTATEMENT APPROVED BY STOCKHOLDERS JUNE 28, 2004


1.    PURPOSES.

      (a)   The purpose of the Plan is to provide a means by which selected
Employees, Directors of and Consultants to the Company, and its Affiliates, may
be given an opportunity to purchase stock of the Company.

      (b)   The Company, by means of the Plan, seeks to retain the services of
persons who are now Employees or Directors of or Consultants to the Company or
its Affiliates, to secure and retain the services of new Employees, Directors
and Consultants, and to provide incentives for such persons to exert maximum
efforts for the success of the Company and its Affiliates.

      (c)   The Company intends that the Options issued under the Plan shall, in
the discretion of the Board or any Committee to which responsibility for
administration of the Plan has been delegated pursuant to subsection 3(c), be
either Incentive Stock Options or Nonstatutory Stock Options. All Options shall
be separately designated Incentive Stock Options or Nonstatutory Stock Options
at the time of grant, and in such form as issued pursuant to Section 6, and a
separate certificate or certificates will be issued for shares purchased on
exercise of each type of Option.

2.    DEFINITIONS.

      (a)   "AFFILIATE" means any parent corporation or subsidiary corporation,
whether now or hereafter existing, as those terms are defined in Sections 424(e)
and (f) respectively, of the Code.

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      (b)   "BOARD" means the Board of Directors of the Company.

      (c)   "CODE" means the Internal Revenue Code of 1986, as amended.

      (d)   "COMMITTEE" means a Committee appointed by the Board in accordance
with subsection 3(c) of the Plan.

      (e)   "COMPANY" means Volterra Semiconductor Corporation, a Delaware
corporation.

      (f)   "CONSULTANT" means any person, including an advisor, engaged by the
Company or an Affiliate to render consulting services and who is compensated for
such services, provided that the term "Consultant" shall not include Directors
who are paid only a director's fee by the Company or who are not compensated by
the Company for their services as Directors.

      (g)   "CONTINUOUS STATUS AS AN EMPLOYEE, DIRECTOR OR CONSULTANT" means
that the service of an individual to the Company, whether as an Employee,
Director or Consultant, is not interrupted or terminated. The Board or the chief
executive officer of the Company may determine, in that party's sole discretion,
whether Continuous Status as an Employee, Director or Consultant shall be
considered interrupted in the case of: (i) any leave of absence approved by the
Board or chief executive officer, including sick leave, military leave, or any
other personal leave; or (ii) transfers between the Company, Affiliates or their
successors.

      (h)   "COVERED EMPLOYEE" means the chief executive officer and the four
(4) other highest compensated officers of the Company for whom total
compensation is required to be reported to stockholders under the Exchange Act,
as determined for purposes of Section 162(m) of the Code.

      (i)   "DIRECTOR" means a member of the Board.

      (j)   "EMPLOYEE" means any person, including Officers and Directors,
employed by the Company or any Affiliate of the Company. Neither service as a
Director nor payment of a director's fee by the Company shall be sufficient to
constitute "employment" by the Company.

      (k)   "EXCHANGE ACT" means the Securities Exchange Act of 1934, as
amended.

      (l)   "FAIR MARKET VALUE" means, as of any date, the value of the common
stock of the Company determined as follows and in each case in a manner
consistent with Section 260.140.50 of Title 10 of the California Code of
Regulations:

            (1)   If the common stock is listed on any established stock
exchange or traded on the Nasdaq National Market System or the Nasdaq SmallCap
Market, the Fair Market Value of a share of common stock shall be the closing
sales price for such stock (or the closing bid, if no sales were reported) as
quoted on such exchange or market (or the exchange or market with the greatest
volume of trading in the Company's common stock) on the last market trading day
prior to the day

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of determination, as reported in The Wall Street Journal or such other source as
the Board deems reliable;

            (2)   In the absence of such markets for the common stock, the Fair
Market Value shall be determined in good faith by the Board.

      (m)   "INCENTIVE STOCK OPTION" means an Option intended to qualify as an
incentive stock option within the meaning of Section 422 of the Code and the
regulations promulgated thereunder.

      (n)   "LISTING DATE" means the first date upon which any security of the
Company is listed (or approved for listing) upon notice of issuance on any
securities exchange, or designated (or approved for designation) upon notice of
issuance as a national market security on an interdealer quotation system if
such securities exchange or interdealer quotation system has been certified in
accordance with the provisions of Section 25100(o) of the California Corporate
Securities Law of 1968.

      (o)   "NON-EMPLOYEE DIRECTOR" means a Director who either (i) is not a
current Employee or Officer of the Company or its parent or subsidiary, does not
receive compensation (directly or indirectly) from the Company or its parent or
subsidiary for services rendered as a consultant or in any capacity other than
as a Director (except for an amount as to which disclosure would not be required
under Item 404(a) of Regulation S-K promulgated pursuant to the Securities Act
of 1933 ("Regulation S-K")), does not possess an interest in any other
transaction as to which disclosure would be required under Item 404(a) of
Regulation S-K, and is not engaged in a business relationship as to which
disclosure would be required under Item 404(b) of Regulation S-K; or (ii) is
otherwise considered a "non-employee director" for purposes of Rule 16b-3.

      (p)   "NONSTATUTORY STOCK OPTION" means an Option not intended to qualify
as an Incentive Stock Option.

      (q)   "OFFICER" means a person who is an officer of the Company within the
meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.

      (r)   "OPTION" means a stock option granted pursuant to the Plan.

      (s)   "OPTION AGREEMENT" means a written agreement between the Company and
an Optionee evidencing the terms and conditions of an individual Option grant.
Each Option Agreement shall be subject to the terms and conditions of the Plan.

      (t)   "OPTIONEE" means a person to whom an Option is granted pursuant to
the Plan, or, if applicable, such other person who holds an outstanding Option.

      (u)   "OUTSIDE DIRECTOR" means a Director who either (i) is not a current
employee of the Company or an "affiliated corporation" (within the meaning of
the Treasury regulations promulgated under Section 162(m) of the Code), is not a
former employee of the Company or an "affiliated corporation" receiving
compensation for prior services (other than benefits under a tax

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qualified pension plan), was not an officer of the Company or an "affiliated
corporation" at any time, and is not currently receiving direct or indirect
remuneration from the Company or an "affiliated corporation" for services in any
capacity other than as a Director, or (ii) is otherwise considered an "outside
director" for purposes of Section 162(m) of the Code.

      (v)   "PLAN" means this Volterra Semiconductor Corporation's Stock Option
Plan.

      (w)   "RULE 16b-3" means Rule 16b-3 of the Exchange Act or any successor
to Rule 16b-3, as in effect with respect to the Company at the time discretion
is being exercised regarding the Plan.

3.    ADMINISTRATION.

      (a)   The Plan shall be administered by the Board unless and until the
Board delegates administration to a Committee, as provided in subsection 3(c).

      (b)   The Board shall have the power, subject to, and within the
limitations of, the express provisions of the Plan:

            (1)   To determine from time to time which of the persons eligible
under the Plan shall be granted Options; when and how each Option shall be
granted; whether an Option will be an Incentive Stock Option or a Nonstatutory
Stock Option; the provisions of each Option granted (which need not be
identical), including the time or times such Option may be exercised in whole or
in part; and the number of shares for which an Option shall be granted to each
such person.

            (2)   To construe and interpret the Plan and Options granted under
it, and to establish, amend and revoke rules and regulations for its
administration. The Board, in the exercise of this power, may correct any
defect, omission or inconsistency in the Plan or in any Option Agreement, in a
manner and to the extent it shall deem necessary or expedient to make the Plan
fully effective.

            (3)   To amend the Plan or an Option as provided in Section 11.

            (4)   Generally, to exercise such powers and to perform such acts as
the Board deems necessary or expedient to promote the best interests of the
Company.

      (c)   The Board may delegate administration of the Plan to a committee of
the Board composed of not fewer than two (2) members (the "Committee"), all of
the members of which Committee may be, in the discretion of the Board,
Non-Employee Directors and/or Outside Directors. If administration is delegated
to a Committee, the Committee shall have, in connection with the administration
of the Plan, the powers theretofore possessed by the Board, including the power
to delegate to a subcommittee of two (2) or more Outside Directors any of the
administrative powers the Committee is authorized to exercise (and references in
this Plan to the Board shall thereafter be to the Committee or such a
subcommittee), subject, however, to such resolutions, not inconsistent with the
provisions of the Plan, as may be adopted from time to time by the Board. The
Board may abolish the Committee at any time and revest in the Board the
administration of the

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Plan. Additionally, prior to the Listing Date and notwithstanding anything to
the contrary contained herein, the Board may delegate administration of the Plan
to a committee of one or more members of the Board and the term "Committee"
shall apply to any person or persons to whom such authority has been delegated.
Notwithstanding anything in this Section 3 to the contrary, the Board or the
Committee may delegate to a committee of one or more members of the Board the
authority to grant Options to eligible persons who (1) are not then subject to
Section 16 of the Exchange Act and/or (2) are either (i) not then Covered
Employees and are not expected to be Covered Employees at the time of
recognition of income resulting from such Option, or (ii) not persons with
respect to whom the Company wishes to comply with Section 162(m) of the Code.

4.    SHARES SUBJECT TO THE PLAN.

      (a)   Subject to the provisions of Section 10 relating to adjustments upon
changes in stock, the stock that may be sold pursuant to Options shall not
exceed in the aggregate thirteen million four hundred sixty-seven thousand five
hundred (13,467,500) shares of the Company's common stock. If any Option shall
for any reason expire or otherwise terminate, in whole or in part, without
having been exercised in full, the stock not purchased under such Option shall
revert to and again become available for issuance under the Plan.

      (b)   The stock subject to the Plan may be unissued shares or reacquired
shares, bought on the market or otherwise.

5.   ELIGIBILITY.

      (a)   Incentive Stock Options may be granted only to Employees.
Nonstatutory Stock Options may be granted only to Employees, Directors or
Consultants.

      (b)   No person shall be eligible for the grant of an Option if, at the
time of grant, such person owns (or is deemed to own pursuant to Section 424(d)
of the Code) stock possessing more than ten percent (10%) of the total combined
voting power of all classes of stock of the Company or of any of its Affiliates
unless the exercise price of such Option is at least one hundred ten percent
(110%) of the Fair Market Value of such stock at the date of grant and the
Option is not exercisable after the expiration of five (5) years from the date
of grant.

      (c)   Subject to the provisions of Section 10 relating to adjustments upon
changes in stock, no person shall be eligible to be granted Options covering
more than two hundred thousand (200,000) shares of the Company's common stock in
any calendar year period. This subsection 5(c) shall not apply prior to the
Listing Date and, following the Listing Date, shall not apply until (i) the
earliest of: (A) the first material modification of the Plan (including any
increase to the number of shares reserved for issuance under the Plan in
accordance with Section 4); (B) the issuance of all of the shares of common
stock reserved for issuance under the Plan; (C) the expiration of the Plan; or
(D) the first meeting of stockholders at which directors are to be elected that
occurs after the close of the third calendar year following the calendar year in
which occurred the first registration of an equity security under Section 12 of
the Exchange Act; or (ii) such other date required by Section 162(m) of the Code
and the rules and regulations promulgated thereunder.

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6.    OPTION PROVISIONS.

      Each Option shall be in such form and shall contain such terms and
conditions as the Board shall deem appropriate. The provisions of separate
Options need not be identical, but each Option shall include (through
incorporation of provisions hereof by reference in the Option or otherwise) the
substance of each of the following provisions:

      (a)   TERM. No Option shall be exercisable after the expiration of ten
(10) years from the date it was granted.

      (b)   PRICE. The exercise price of each Incentive Stock Option shall be
not less than one hundred percent (100%) of the Fair Market Value of the stock
subject to the Option on the date the Option is granted; the exercise price of
each Nonstatutory Stock Option shall be not less than eighty-five percent (85%)
of the Fair Market Value of the stock subject to the Option on the date the
Option is granted. Notwithstanding the foregoing, an Option (whether an
Incentive Stock Option or a Nonstatutory Stock Option) may be granted with an
exercise price lower than that set forth in the preceding sentence if such
Option is granted pursuant to an assumption or substitution for another option
in a manner satisfying the provisions of Section 424(a) of the Code.

      (c)   CONSIDERATION. The purchase price of stock acquired pursuant to an
Option shall be paid, to the extent permitted by applicable statutes and
regulations, either (i) in cash at the time the Option is exercised, or (ii) at
the discretion of the Board or the Committee, at the time of the grant of the
Option, (A) by delivery to the Company of other common stock of the Company, (B)
according to a deferred payment arrangement, except that payment of the common
stock's "par value" (as defined in the Delaware General Corporation Law) shall
not be made by deferred payment, or other arrangement (which may include,
without limiting the generality of the foregoing, the use of other common stock
of the Company) with the person to whom the Option is granted or to whom the
Option is transferred pursuant to subsection 6(d), or (C) in any other form of
legal consideration that may be acceptable to the Board.

      In the case of any deferred payment arrangement, interest shall be payable
at least annually and shall be charged at the minimum rate of interest necessary
to avoid the treatment as interest, under any applicable provisions of the Code,
of any amounts other than amounts stated to be interest under the deferred
payment arrangement.

      (d)   TRANSFERABILITY. An Option shall not be transferable except by will
or by the laws of descent and distribution, and shall be exercisable during the
lifetime of the person to whom the Option is granted only by such person.

      (e)   VESTING. The total number of shares of stock subject to an Option
may, but need not, be allotted in periodic installments (which may, but need
not, be equal). The Option Agreement may provide that from time to time during
each of such installment periods, the Option may become exercisable ("vest")
with respect to some or all of the shares allotted to that period, and may be
exercised with respect to some or all of the shares allotted to such period
and/or any prior period as to which the Option became vested but was not fully
exercised. The Option may be subject to such other terms and conditions on the
time or times when it may be exercised (which

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may be based on performance or other criteria) as the Board may deem
appropriate. The vesting provisions of individual Options may vary but in each
case will provide for vesting of at least twenty percent (20%) per year of the
total number of shares subject to the Option. The provisions of this subsection
6(e) are subject to any Option provisions governing the minimum number of shares
as to which an Option may be exercised.

      (f)   SECURITIES LAW COMPLIANCE. The Company may require any Optionee, or
any person to whom an Option is transferred under subsection 6(d), as a
condition of exercising any such Option, (1) to give written assurances
satisfactory to the Company as to the Optionee's knowledge and experience in
financial and business matters and/or to employ a purchaser representative
reasonably satisfactory to the Company who is knowledgeable and experienced in
financial and business matters, and that he or she is capable of evaluating,
alone or together with the purchaser representative, the merits and risks of
exercising the Option; and (2) to give written assurances satisfactory to the
Company stating that such person is acquiring the stock subject to the Option
for such person's own account and not with any present intention of selling or
otherwise distributing the stock. The foregoing requirements, and any assurances
given pursuant to such requirements, shall be inoperative if (i) the issuance of
the shares upon the exercise of the Option has been registered under a then
currently effective registration statement under the Securities Act of 1933, as
amended (the "Securities Act"), or (ii) as to any particular requirement, a
determination is made by counsel for the Company that such requirement need not
be met in the circumstances under the then applicable securities laws. The
Company may require the Optionee to provide such other representations, written
assurances or information which the Company shall determine is necessary,
desirable or appropriate to comply with applicable securities and other laws as
a condition of granting an Option to such Optionee or permitting the Optionee to
exercise such Option. The Company may, upon advice of counsel to the Company,
place legends on stock certificates issued under the Plan as such counsel deems
necessary or appropriate in order to comply with applicable securities laws,
including, but not limited to, legends restricting the transfer of the stock.

      (g)   TERMINATION OF EMPLOYMENT OR RELATIONSHIP AS A DIRECTOR OR
CONSULTANT. In the event an Optionee's Continuous Status as an Employee,
Director or Consultant terminates (other than upon the Optionee's death or
disability), the Optionee may exercise his or her Option (to the extent that the
Optionee was entitled to exercise it as of the date of termination) but only
within such period of time ending on the earlier of (i) the date three (3)
months after the termination of the Optionee's Continuous Status as an Employee,
Director or Consultant, or such longer or shorter period, which in no event
shall be less than thirty (30) days, specified in the Option Agreement, or (ii)
the expiration of the term of the Option as set forth in the Option Agreement.
If, at the date of termination, the Optionee is not entitled to exercise his or
her entire Option, the shares covered by the unexercisable portion of the Option
shall revert to and again become available for issuance under the Plan. If,
after termination, the Optionee does not exercise his or her Option within the
time specified in the Option Agreement, the Option shall terminate, and the
shares covered by such Option shall revert to and again become available for
issuance under the Plan.

      (h)   DISABILITY OF OPTIONEE. In the event an Optionee's Continuous Status
as an Employee, Director or Consultant terminates as a result of the Optionee's
disability, the Optionee may exercise his or her Option (to the extent that the
Optionee was entitled to exercise it as of the

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date of termination), but only within such period of time ending on the earlier
of (i) the date twelve (12) months following such termination (or such longer or
shorter period, which in no event shall be less than six (6) months, specified
in the Option Agreement), or (ii) the expiration of the term of the Option as
set forth in the Option Agreement. If, at the date of termination, the Optionee
is not entitled to exercise his or her entire Option, the shares covered by the
unexercisable portion of the Option shall revert to and again become available
for issuance under the Plan. If, after termination, the Optionee does not
exercise his or her Option within the time specified herein, the Option shall
terminate, and the shares covered by such Option shall revert to and again
become available for issuance under the Plan.

      (i)   DEATH OF OPTIONEE. In the event of the death of an Optionee during,
or within a period specified in the Option Agreement after the termination of,
the Optionee's Continuous Status as an Employee, Director or Consultant, the
Option may be exercised (to the extent the Optionee was entitled to exercise the
Option as of the date of death) by the Optionee's estate, by a person who
acquired the right to exercise the Option by bequest or inheritance or by a
person designated to exercise the option upon the Optionee's death pursuant to
subsection 6(d), but only within the period ending on the earlier of (i) the
date eighteen (18) months following the date of death (or such longer or shorter
period, which in no event shall be less than six (6) months, specified in the
Option Agreement), or (ii) the expiration of the term of such Option as set
forth in the Option Agreement. If, at the time of death, the Optionee was not
entitled to exercise his or her entire Option, the shares covered by the
unexercisable portion of the Option shall revert to and again become available
for issuance under the Plan. If, after death, the Option is not exercised within
the time specified herein, the Option shall terminate, and the shares covered by
such Option shall revert to and again become available for issuance under the
Plan.

      (j)   EARLY EXERCISE. The Option may, but need not, include a provision
whereby the Optionee may elect at any time while an Employee, Director or
Consultant to exercise the Option as to any part or all of the shares subject to
the Option prior to the full vesting of the Option. Any unvested shares so
purchased shall be subject to a repurchase right in favor of the Company, with
the repurchase price to be equal to the original purchase price of the stock, or
to any other restriction the Board determines to be appropriate; provided,
however, that (i) the right to repurchase at the original purchase price shall
lapse at a minimum rate of twenty percent (20%) per year over five (5) years
from the date the Option was granted, and (ii) such right shall be exercisable
only within (A) the ninety (90) day period following the termination of
employment or the relationship as a Director or Consultant or (B) such longer
period as may be agreed to by the Company and the Optionee (for example, for
purposes of satisfying the requirements of Section 1202(c)(3) of the Code
(regarding "qualified small business stock")), and (iii) such right shall be
exercisable only for cash or cancellation of purchase money indebtedness for the
shares. Should the right of repurchase be assigned by the Company, the assignee
shall pay the Company cash equal to the difference between the original purchase
price and the stock's Fair Market Value if the original purchase price is less
than the stock's Fair Market Value.

      (k)   RIGHT OF REPURCHASE. The Option may, but need not, include a
provision whereby the Company may elect, prior to the Listing Date to repurchase
all or any part of the vested shares exercised pursuant to the Option; provided,
however, that (i) such repurchase right shall be exercisable only within (A) the
ninety (90) day period following the termination of employment or

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the relationship as a Director or Consultant or (B) such longer period as may be
agreed to by the Company and the Optionee (for example, for purposes of
satisfying the requirements of Section 1202(c)(3) of the Code (regarding
"qualified small business stock")), (ii) such repurchase right shall be
exerciseable for less than all of the vested shares only with the Optionee's
consent, and (iii) such right shall be exercisable only for cash or cancellation
of purchase money indebtedness for the shares at a repurchase price equal to the
greater of (A) the stock's Fair Market Value at the time of such termination, or
(B) the original purchase price paid for such shares by the Optionee. Should the
right of repurchase be assigned by the Company, the assignee shall pay the
Company cash equal to the difference between the original purchase price and the
stock's Fair Market Value if the original purchase price is less than the
stock's Fair Market Value.

      (l)   RIGHT OF FIRST REFUSAL. The Option may, but need not, include a
provision whereby the Company may elect, prior to the Listing Date, to exercise
a right of first refusal following receipt of notice from the Optionee of the
intent to transfer all or any part of the shares exercised pursuant to the
Option. Such right of first refusal shall be exercised by the Company no more
than thirty (30) days following receipt of notice of the Optionee's intent to
transfer shares and must be exercised as to all the shares the Optionee intends
to transfer unless the Optionee consents to exercise for less than all the
shares offered. The purchase of the shares following exercise shall be completed
within thirty (30) days of the Company's receipt of notice of the Optionee's
intent to transfer shares or such longer period of time as has been offered by
the person to whom the Optionee intends to transfer the shares, or as may be
agreed to by the Company and the Optionee (for example, for purposes of
satisfying the requirements of Section 1202(c)(3) of the Code (regarding
"qualified small business stock"). Except as expressly provided in this
Subsection (l), such right of first refusal shall otherwise comply with the
provisions of the Bylaws of the Company. Such right of first refusal shall
otherwise comply with the provisions of the Bylaws of the Company.

      (m)   WITHHOLDING. To the extent provided by the terms of an Option
Agreement, the Optionee may satisfy any federal, state or local tax withholding
obligation relating to the exercise of such Option by any of the following means
or by a combination of such means: (1) tendering a cash payment; (2) authorizing
the Company to withhold shares from the shares of the common stock otherwise
issuable to the Optionee as a result of the exercise of the Option; or (3)
delivering to the Company owned and unencumbered shares of the common stock of
the Company.

7.    COVENANTS OF THE COMPANY.

      (a)   During the terms of the Options, the Company shall keep available at
all times the number of shares of stock required to satisfy such Options.

      (b)   The Company shall seek to obtain from each regulatory commission or
agency having jurisdiction over the Plan such authority as may be required to
issue and sell shares of stock upon exercise of the Options; provided, however,
that this undertaking shall not require the Company to register under the
Securities Act either the Plan, any Option or any stock issued or issuable
pursuant to any such Option. If, after reasonable efforts, the Company is unable
to obtain from any such regulatory commission or agency the authority which
counsel for the Company deems necessary for the lawful issuance and sale of
stock under the Plan, the Company shall be

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relieved from any liability for failure to issue and sell stock upon exercise of
such Options unless and until such authority is obtained.

8.    USE OF PROCEEDS FROM STOCK.

      Proceeds from the sale of stock pursuant to Options shall constitute
general funds of the Company.

9.    MISCELLANEOUS.

      (a)   Subject to any applicable provisions of the California Corporate
Securities Law of 1968 and related regulations relied upon as a condition of
issuing securities pursuant to the Plan, the Board shall have the power to
accelerate the time at which an Option may first be exercised or the time during
which an Option or any part thereof will vest pursuant to subsection 6(e),
notwithstanding the provisions in the Option stating the time at which it may
first be exercised or the time during which it will vest.

      (b)   Neither an Optionee nor any person to whom an Option is transferred
under subsection 6(d) shall be deemed to be the holder of, or to have any of the
rights of a holder with respect to, any shares subject to such Option unless and
until such person has satisfied all requirements for exercise of the Option
pursuant to its terms.

      (c)   Throughout the term of any Option, the Company shall deliver to the
holder of such Option, not later than one hundred twenty (120) days after the
close of each of the Company's fiscal years during the Option term, a balance
sheet and an income statement. This section shall not apply (i) after the
Listing Date or (ii) when issuance is limited to key employees whose duties in
connection with the Company assure them access to equivalent information.

      (d)   Nothing in the Plan or any instrument executed or Option granted
pursuant thereto shall confer upon any Employee, Director, Consultant or
Optionee any right to continue in the employ of the Company or any Affiliate (or
to continue acting as a Director or Consultant) or shall affect the right of the
Company or any Affiliate to terminate the employment of any Employee, with or
without cause, to remove any Director as provided in the Company's By-Laws and
the provisions of the General Corporation Law of the State of Delaware, or to
terminate the relationship of any Consultant subject to the terms of that
Consultant's agreement with the Company or Affiliate to which such Consultant is
providing services.

      (e)   To the extent that the aggregate Fair Market Value (determined at
the time of grant) of stock with respect to which Incentive Stock Options are
exercisable for the first time by any Optionee during any calendar year under
all plans of the Company and its Affiliates exceeds one hundred thousand dollars
($100,000), the Options or portions thereof which exceed such limit (according
to the order in which they were granted) shall be treated as Nonstatutory Stock
Options.

      (f)   (1)     The Board or the Committee shall have the authority to
effect, at any time and from time to time (i) the repricing of any outstanding
Options under the Plan and/or (ii) with the consent of the affected holders of
Options, the cancellation of any outstanding Options and the grant

                                       10

<PAGE>

in substitution therefor of new Options under the Plan covering the same or
different numbers of shares of common stock, but having an exercise price per
share not less than eighty-five percent (85%) of the Fair Market Value in the
case of a Nonstatutory Stock Option (one hundred percent (100%) of the Fair
Market Value in the case of an Incentive Stock Option or, in the case of a ten
percent (10%) stockholder (as defined in subsection 5(b)), not less than one
hundred and ten percent (110%) of the Fair Market Value) per share of common
stock on the new grant date.

            (2)   Shares subject to an Option canceled under this subsection
9(f) shall continue to be counted against the maximum award of Options permitted
to be granted pursuant to subsection 5(c) of the Plan. The repricing of an
Option under this subsection 9(f), resulting in a reduction of the exercise
price, shall be deemed to be a cancellation of the original Option and the grant
of a substitute Option; in the event of such repricing, both the original and
the substituted Options shall be counted against the maximum awards of Options
permitted to be granted pursuant to subsection 5(c) of the Plan. The provisions
of this subsection 9(f) shall be applicable only to the extent required by
Section 162(m) of the Code.

10.   ADJUSTMENTS UPON CHANGES IN STOCK.

      (a)   If any change is made in the stock subject to the Plan, or subject
to any Option (through merger, consolidation, reorganization, recapitalization,
stock dividend, dividend in property other than cash, stock split, liquidating
dividend, combination of shares, exchange of shares, change in corporate
structure or other transaction not involving the receipt of consideration by the
Company), the Plan will be appropriately adjusted in the type(s) and maximum
number of securities subject to the Plan pursuant to subsection 4(a) and the
maximum number of securities subject to award to any person during any calendar
year period pursuant to subsection 5(c), and the outstanding Options will be
appropriately adjusted in the type(s) and number of securities and price per
share of stock subject to such outstanding Options. Such adjustments shall be
made by the Board or Committee, the determination of which shall be final,
binding and conclusive. (The conversion of any convertible securities of the
Company shall not be treated as a "transaction not involving the receipt of
consideration by the Company.")

      (b)   In the event of: (1) a dissolution, liquidation, or sale of all or
substantially all of the assets of the Company; (2) a merger or consolidation in
which the Company is not the surviving corporation; or (3) a reverse merger in
which the Company is the surviving corporation but the shares of the Company's
common stock outstanding immediately preceding the merger are converted by
virtue of the merger into other property, whether in the form of securities,
cash or otherwise, then: (i) any surviving or acquiring corporation shall assume
Options outstanding under the Plan or shall substitute similar options
(including an option to acquire the same consideration paid to stockholders in
the transaction described in this Subsection 10(b)) for those outstanding under
the Plan, or (ii) in the event any surviving or acquiring corporation refuses to
assume such Options or to substitute similar options for those outstanding under
the Plan, (A) with respect to Options held by persons then performing services
as Employees, Directors or Consultants and subject to any applicable provisions
of the California Corporate Securities Law of 1968 and related regulations
relied upon as a condition of issuing securities pursuant to the Plan, the
vesting of such Options and the time during which such Options may be exercised
shall be accelerated prior to such event and the Options terminated if not
exercised after such acceleration and at or prior to such

                                       11

<PAGE>

event, and (B) with respect to any other Options outstanding under the Plan,
such Options shall be terminated if not exercised prior to such event.

11.   AMENDMENT OF THE PLAN AND OPTIONS.

      (a)   The Board at any time, and from time to time, may amend the Plan.
However, except as provided in Section 10 relating to adjustments upon changes
in stock, no amendment shall be effective unless approved by the stockholders of
the Company within twelve (12) months before or after the adoption of the
amendment, where the amendment will:

            (1)   Increase the number of shares reserved for Options under the
Plan;

            (2)   Modify the requirements as to eligibility for participation in
the Plan (to the extent such modification requires stockholder approval in order
for the Plan to satisfy the requirements of Section 422 of the Code); or

            (3)   Modify the Plan in any other way if such modification requires
stockholder approval in order for the Plan to satisfy the requirements of
Section 422 of the Code or to comply with the requirements of Rule 16b-3.

      (b)   The Board may in its sole discretion submit any other amendment to
the Plan for stockholder approval, including, but not limited to, amendments to
the Plan intended to satisfy the requirements of Section 162(m) of the Code and
the regulations promulgated thereunder regarding the exclusion of
performance-based compensation from the limit on corporate deductibility of
compensation paid to certain executive officers.

      (c)   It is expressly contemplated that the Board may amend the Plan in
any respect the Board deems necessary or advisable to provide Optionees with the
maximum benefits provided or to be provided under the provisions of the Code and
the regulations promulgated thereunder relating to Incentive Stock Options
and/or to bring the Plan and/or Incentive Stock Options granted under it into
compliance therewith.

      (d)   Rights and obligations under any Option granted before amendment of
the Plan shall not be impaired by any amendment of the Plan unless (i) the
Company requests the consent of the person to whom the Option was granted and
(ii) such person consents in writing.

      (e)   The Board at any time, and from time to time, may amend the terms of
any one or more Options; provided, however, that the rights and obligations
under any Option shall not be impaired by any such amendment unless (i) the
Company requests the consent of the person to whom the Option was granted and
(ii) such person consents in writing.

12.   TERMINATION OR SUSPENSION OF THE PLAN.

      (a)   The Board may suspend or terminate the Plan at any time. Unless
sooner terminated, the Plan shall terminate on October 28, 2006, which shall be
within ten (10) years from the date the Plan is adopted by the Board or approved
by the stockholders of the Company,

                                       12

<PAGE>

whichever is earlier. No Options may be granted under the Plan while the Plan is
suspended or after it is terminated.

      (b)   Rights and obligations under any Option granted while the Plan is in
effect shall not be impaired by suspension or termination of the Plan, except
with the written consent of the person to whom the Option was granted.

13.   EFFECTIVE DATE OF PLAN.

      The Plan shall become effective as determined by the Board, but no Options
granted under the Plan shall be exercised unless and until the Plan has been
approved by the stockholders of the Company, which approval shall be within
twelve (12) months before or after the date the Plan is adopted by the Board,
and, if required, an appropriate permit has been issued by the Commissioner of
Corporations of the State of California.

                                       13

<PAGE>

                                                         Grant Date:  ,
                                                         Number of Shares:
                                                         Exercise Price: $
                                                         Total Exercise Price: $

                             INCENTIVE STOCK OPTION

      Optionee:

      VOLTERRA SEMICONDUCTOR CORPORATION (the "Company"), pursuant to its 1996
Stock Option Plan (the "Plan"), has granted to you, the optionee named above, an
option to purchase shares of the common stock of the Company ("Common Stock").
This option is intended to qualify as an "incentive stock option" within the
meaning of Section 422 of the Internal Revenue Code of 1986, as amended (the
"Code").

      The grant hereunder is in connection with and in furtherance of the
Company's compensatory benefit plan for participation of the Company's employees
(including officers), directors or consultants and is intended to comply with
the provisions of Rule 701 promulgated y the Securities and Exchange Commission
under the Securities Act of 1933, as amended (the "Act"). The grant of this
option and the issuance of shares upon the exercise of this option are also
intended to be exempt from the securities qualification requirements of the
California Corporations Code pursuant to Section 25102(o) of that code. Defined
terms not explicitly defined in this agreement but defined in the Plan shall
have the same definitions as in the Plan.

      The details of your option are as follows:

      1.    TOTAL NUMBER OF SHARES SUBJECT TO THIS OPTION. The total number of
shares of Common Stock subject to this option is ().

      2.    VESTING. Subject to the limitations contained herein, 25% of the
shares will vest (become exercisable) on          ,           (one year from the
date vesting commences) and 6.25% of the shares will then vest each quarter
thereafter until either (i) you cease employment with the Company for any
reason, or (ii) this option becomes fully vested.

      3.    EXERCISE PRICE AND METHOD OF PAYMENT.

            (a)   EXERCISE PRICE. The exercise price of this option is
($          ) per share, being not less than the fair market value of the Common
Stock on the date of grant of this option.

            (b)   METHOD OF PAYMENT. Payment of the exercise price per share is
due in full upon exercise of all or any part of each installment which has
accrued to you. You may

                                       1

<PAGE>

elect, to the extent permitted by applicable statutes and regulations, to make
payment of the exercise price under one of the following alternatives:

                        (i)   Payment of the exercise price per share in cash
(including check) at the time of exercise;

                        (ii)  Payment pursuant to a program developed under
Regulation T as promulgated by the Federal Reserve Board which, prior to the
issuance of Common Stock, results in either the receipt of cash (or check) by
the Company or the receipt of irrevocable instructions to pay the aggregate
exercise price to the Company from the sales proceeds;

                        (iii) Provided that at the time of exercise the
Company's Common Stock is publicly traded and quoted regularly in the Wall
Street Journal, payment by delivery of already-owned shares of Common Stock,
held for the period required to avoid a charge to the Company's reported
earnings, and owned free and clear of any liens, claims, encumbrances or
security interests, which Common Stock shall be valued at its fair market value
on the date of exercise; or

                        (iv)  Payment by a combination of the methods of payment
permitted by subparagraph 3(b)(i) through 3(b)(iii) above.

      4.    WHOLE SHARES. This option may not be exercised for any number of
shares which would require the issuance of anything other than whole shares.

      5.    SECURITIES LAW COMPLIANCE. Notwithstanding anything to the contrary
contained herein, this option may not be exercised unless the shares issuable
upon exercise of this option are then registered under the Act or, if such
shares are not then so registered, the Company has determined that such exercise
and issuance would be exempt from the registration requirements of the Act.

      6.    TERM. The term of this option commences on        ,           , the
date of grant, and expires on         ,          (the "Expiration Date," which
date shall be no more than ten (10) years from the date this option is granted),
unless this option expires sooner as set forth below or in the Plan. In no event
may this option be exercised on or after the Expiration Date. This option shall
terminate prior to the Expiration Date as follows: three (3) months after the
termination of your Continuous Status as an Employee, Director or Consultant
with the Company or an Affiliate of the Company unless one of the following
circumstances exists:

            (a)   Your termination of Continuous Status as an Employee, Director
or Consultant is due to your permanent and total disability (within the meaning
of Section 422(c)(6) of the Code). This option will then expire on the earlier
of the Expiration Date set forth above or twelve (12) months following such
termination of Continuous Status as an Employee, Director or Consultant.

                                       2

<PAGE>

            (b)   Your termination of Continuous Status as an Employee, Director
or Consultant is due to your death or your death occurs within three (3) months
following your termination of Continuous Status as an Employee, Director or
Consultant for any other reason. This option will then expire on the earlier of
the Expiration Date set forth above or eighteen (18) months after your death.

            (c)   If during any part of such three (3) month period you may not
exercise your option solely because of the condition set forth in paragraph 5
above, then your option will not expire until the earlier of the Expiration Date
set forth above or until this option shall have been exercisable for an
aggregate period of three (3) months after your termination of Continuous Status
as an Employee, Director or Consultant.

            (d)   If your exercise of the option within three (3) months after
termination of your Continuous Status as an Employee, Director or Consultant
with the Company or with an Affiliate of the Company would result in liability
under section 16(b) of the Securities Exchange Act of 1934, then your option
will expire on the earlier of (i) the Expiration Date set forth above, (ii) the
tenth (10th) day after the last date upon which exercise would result in such
liability or (iii) six (6) months and ten (10) days after the termination of
your Continuous Status as an Employee, Director or Consultant with the Company
or an Affiliate of the Company.

      However, this option may be exercised following termination of Continuous
Status as an Employee, Director or Consultant only as to that number of shares
as to which it was exercisable on the date of termination of Continuous Status
as an Employee, Director or Consultant under the provisions of paragraph 2 of
this option.

      In order to obtain the federal income tax advantages associated with an
"incentive stock option," the Code requires that at all times beginning on the
date of grant of the option and ending on the day three (3) months before the
date of the option's exercise, you must be an employee of the Company or an
Affiliate of the Company, except in the event of your death or permanent and
total disability. The Company has provided for continued vesting or extended
exercisability of your option under certain circumstances for your benefit, but
cannot guarantee that your option will necessarily be treated as an "incentive
stock option" if you provide services to the Company or an Affiliate of the
Company as a consultant or exercise your option more than three (3) months after
the date your employment with the Company and all Affiliates of the Company
terminates.

      7.    EXERCISE.

            (a)   This option may be exercised, to the extent specified above,
by delivering a notice of exercise (in a form designated by the Company)
together with the exercise price to the Secretary of the Company, or to such
other person as the Company may designate, during regular business hours,
together with such additional documents as the Company may then require pursuant
to subsection 6(f) of the Plan.

            (b)   By exercising this option you agree that:

                                       3

<PAGE>

                        (i)   as a precondition to the completion of any
exercise of this option, the Company may require you to enter an arrangement
providing for the payment by you to the Company of any tax withholding
obligation of the Company arising by reason of (1) the exercise of this option;
(2) the lapse of any substantial risk of forfeiture to which the shares are
subject at the time of exercise; or (3) the disposition of shares acquired upon
such exercise;

                        (ii)  you will notify the Company in writing within
fifteen (15) days after the date of any disposition of any of the shares of the
Common Stock issued upon exercise of this option that occurs within two (2)
years after the date of this option grant or within one (1) year after such
shares of Common Stock are transferred upon exercise of this option; and

                        (iii) the Company (or a representative of the
underwriters) may, in connection with the first underwritten registration of the
offering of any securities of the Company under the Act, require that you not
sell or otherwise transfer or dispose of any shares of Common Stock or other
securities of the Company during such period (not to exceed one hundred eighty
(180) days) following the effective date (the "Effective Date") of the
registration statement of the Company filed under the Act as may be requested by
the Company or the representative of the underwriters. You further agree that
the Company may impose stop-transfer instructions with respect to securities
subject to the foregoing restrictions until the end of such period.

      8.    TRANSFERABILITY. This option is not transferable, except by will or
by the laws of descent and distribution, and is exercisable during your life
only by you. Notwithstanding the foregoing, by delivering written notice to the
Company, in a form satisfactory to the Company, you may designate a third party
who, in the event of your death, shall thereafter be entitled to exercise this
option.

      9.    OPTION NOT A SERVICE CONTRACT. This option is not an employment
contract and nothing in this option shall be deemed to create in any way
whatsoever any obligation on your part to continue in the employ of the Company,
or of the Company to continue your employment with the Company. In addition,
nothing in this option shall obligate the Company or any Affiliate of the
Company, or their respective shareholders, Board of Directors, officers or
employees to continue any relationship which you might have as a Director or
Consultant for the Company or Affiliate of the Company.

      10.   NOTICES. Any notices provided for in this option or the Plan shall
be given in writing and shall be deemed effectively given upon receipt or, in
the case of notices delivered by the Company to you, five (5) days after deposit
in the United States mail, postage prepaid, addressed to you at the address
specified below or at such other address as you hereafter designate by written
notice to the Company.

                                       4

<PAGE>

      11.   GOVERNING PLAN DOCUMENT. This option is subject to all the
provisions of the Plan, a copy of which is attached hereto and its provisions
are hereby made a part of this option, including without limitation the
provisions of Section 6 of the Plan relating to option provisions, and is
further subject to all interpretations, amendments, rules and regulations which
may from time to time be promulgated and adopted pursuant to the Plan. In the
event of any conflict between the provisions of this option and those of the
Plan, the provisions of the Plan shall control.

      Dated the day of

                                                   Very truly yours,

                                                   _____________________________
                                                   Greg Hildebrand
                                                   Director of Finance

                                                   Duly authorized on behalf
                                                   of the Board of Directors

ATTACHMENTS:

      Notice of Exercise

                                       5

<PAGE>

                                                      Grant Date:   ,
                                                      Number of Shares:
                                                      Exercise Price: $
                                                      Total Exercise Price: $

The undersigned:

      (a)   Acknowledges receipt of the foregoing option and the attachments
referenced therein and understands that all rights and liabilities with respect
to this option are set forth in the option and the Plan; and

      (b)   Acknowledges that as of the date of grant of this option, it sets
forth the entire understanding between the undersigned optionee and the Company
and its Affiliates regarding the acquisition of stock in the Company and
supersedes all prior oral and written agreements on that subject with the
exception of (i) the options previously granted and delivered to the undersigned
under stock option plans of the Company, and (ii) the following agreements only:

      NONE     _________________________
               (Initial)

      OTHER

              ___________________________________________
              ___________________________________________
              ___________________________________________

                                               ________________________________

                                               OPTIONEE

                                               Address:

                                       6

<PAGE>

                                                         Grant Date:
                                                         Number of Shares:
                                                         Exercise Price: $
                                                         Total Exercise Price: $

                            NONSTATUTORY STOCK OPTION

      , Optionee:

      VOLTERRA SEMICONDUCTOR CORPORATION (the "Company"), pursuant to its 1996
Stock Option Plan (the "Plan"), has granted to you, the optionee named above, an
option to purchase shares of the common stock of the Company ("Common Stock").
This option is not intended to qualify and will not be treated as an "incentive
stock option" within the meaning of Section 422 of the Internal Revenue Code of
1986, as amended (the "Code").

      The grant hereunder is in connection with and in furtherance of the
Company's compensatory benefit plan for participation of the Company's employees
(including officers), directors or consultants and is intended to comply with
the provisions of Rule 701 promulgated by the Securities and Exchange Commission
under the Securities Act of 1933, as amended (the "Act"). The grant of this
option and the issuance of shares upon the exercise of this option are also
intended to be exempt from the securities qualification requirements of the
California Corporations Code pursuant to Section 25102(o) of that code. Defined
terms not explicitly defined in this agreement but defined in the Plan shall
have the same definitions as in the Plan.

      The details of your option are as follows:

      1.    TOTAL NUMBER OF SHARES SUBJECT TO THIS OPTION. The total number of
shares of Common Stock subject to this option is        (      ).

      2.    VESTING. Subject to the limitations contained herein, 25% of the
shares will vest (become exercisable) on        ,        (one year from the date
vesting commences) and 6.25% of the shares will then vest each quarter
thereafter until either (i) you cease to provide services to the Company for any
reason, or (ii) this option becomes fully vested.

      3.    EXERCISE PRICE AND METHOD OF PAYMENT.

            (a)   EXERCISE PRICE. The exercise price of this option is
($        ) per share, being not less than 85% of the fair market value of the
Common Stock on the date of grant of this option.

            (b)   METHOD OF PAYMENT. Payment of the exercise price per share is
due in full

<PAGE>

upon exercise of all or any part of each installment which has accrued to you.
You may elect, to the extent permitted by applicable statutes and regulations,
to make payment of the exercise price under one of the following alternatives:

                        (i)   Payment of the exercise price per share in cash
(including check) at the time of exercise;

                        (ii)  Payment pursuant to a program developed under
Regulation T as promulgated by the Federal Reserve Board which, prior to the
issuance of Common Stock, results in either the receipt of cash (or check) by
the Company or the receipt of irrevocable instructions to pay the aggregate
exercise price to the Company from the sales proceeds;

                        (iii) Provided that at the time of exercise the
Company's Common Stock is publicly traded and quoted regularly in the Wall
Street Journal, payment by delivery of already-owned shares of Common Stock,
held for the period required to avoid a charge to the Company's reported
earnings, and owned free and clear of any liens, claims, encumbrances or
security interests, which Common Stock shall be valued at its fair market value
on the date of exercise; or

                        (iv)  Payment by a combination of the methods of payment
permitted by subparagraph 3(b)(i) through 3(b)(iii) above.

      4.    WHOLE SHARES. This option may not be exercised for any number of
shares which would require the issuance of anything other than whole shares.

      5.    SECURITIES LAW COMPLIANCE. Notwithstanding anything to the contrary
contained herein, this option may not be exercised unless the shares issuable
upon exercise of this option are then registered under the Act or, if such
shares are not then so registered, the Company has determined that such exercise
and issuance would be exempt from the registration requirements of the Act.

      6.    TERM. The term of this option commences on           , the date of
grant and expires on        (the "Expiration Date," which date shall be no more
than ten (10) years from the date this option is granted), unless this option
expires sooner as set forth below or in the Plan. In no event may this option be
exercised on or after the Expiration Date. This option shall terminate prior to
the Expiration Date as follows: three (3) months after the termination of your
Continuous Status as an Employee, Director or Consultant with the Company or an
Affiliate of the Company for any reason or for no reason unless:

            (a)   such termination of Continuous Status as an Employee, Director
or Consultant is due to your permanent and total disability (within the meaning
of Section 422(c)(6) of the Code), in which event the option shall expire on the
earlier of the Expiration Date set forth above or twelve (12) months following
such termination of Continuous Status as

<PAGE>

an Employee, Director or Consultant; or

            (b)   such termination of Continuous Status as an Employee, Director
or Consultant is due to your death or your death occurs within three (3) months
following your termination for any other reason, in which event the option shall
expire on the earlier of the Expiration Date set forth above or eighteen (18)
months after your death; or

            (c)   during any part of such three (3) month period the option is
not exercisable solely because of the condition set forth in paragraph 5 above,
in which event the option shall not expire until the earlier of the Expiration
Date set forth above or until it shall have been exercisable for an aggregate
period of three (3) months after the termination of Continuous Status as an
Employee, Director or Consultant; or

            (d)   exercise of the option within three (3) months after
termination of your Continuous Status as an Employee, Director or Consultant
with the Company or with an Affiliate of the Company would result in liability
under section 16(b) of the Securities Exchange Act of 1934 (the "Exchange Act),
in which case the option will expire on the earlier of (i) the Expiration Date
set forth above, (ii) the tenth (10th) day after the last date upon which
exercise would result in such liability or (iii) six (6) months and ten (10)
days after the termination of your Continuous Status as an Employee, Director or
Consultant with the Company or an Affiliate of the Company.

      However, this option may be exercised following termination of Continuous
Status as an Employee, Director or Consultant only as to that number of shares
as to which it was exercisable on the date of termination of Continuous Status
as an Employee, Director or Consultant under the provisions of paragraph 2 of
this option.

      7.    EXERCISE.

            (a)   This option may be exercised, to the extent specified above,
by delivering a notice of exercise (in a form designated by the Company)
together with the exercise price to the Secretary of the Company, or to such
other person as the Company may designate, during regular business hours,
together with such additional documents as the Company may then require pursuant
to subsection 6(f) of the Plan.

            (b)   By exercising this option you agree that:

                        (i)   as a precondition to the completion of any
exercise of this option, the Company may require you to enter an arrangement
providing for the cash payment by you to the Company of any tax withholding
obligation of the Company arising by reason of: (1) the exercise of this option;
(2) the lapse of any substantial risk of forfeiture to which the shares are
subject at the time of exercise; or (3) the disposition of shares acquired upon
such exercise. You also agree that any exercise of this option has not been
completed and that the Company is under no obligation to issue any Common Stock
to you until such an

<PAGE>

arrangement is established or the Company's tax withholding obligations are
satisfied, as determined by the Company; and

                        (ii)  the Company (or a representative of the
underwriters) may, in connection with the first underwritten registration of the
offering of any securities of the Company under the Act, require that you not
sell or otherwise transfer or dispose of any shares of Common Stock or other
securities of the Company during such period (not to exceed one hundred eighty
(180) days) following the effective date (the "Effective Date") of the
registration statement of the Company filed under the Act as may be requested by
the Company or the representative of the underwriters. You further agree that
the Company may impose stop-transfer instructions with respect to securities
subject to the foregoing restrictions until the end of such period.

      8.    TRANSFERABILITY. This option is not transferable, except by will or
by the laws of descent and distribution, and is exercisable during your life
only by you. Notwithstanding the foregoing, by delivering written notice to the
Company, in a form satisfactory to the Company, you may designate a third party
who, in the event of your death, shall thereafter be entitled to exercise this
option.

      9.    OPTION NOT A SERVICE CONTRACT. This option is not an employment
contract and nothing in this option shall be deemed to create in any way
whatsoever any obligation on your part to continue in the employ of the Company,
or of the Company to continue your employment with the Company. In addition,
nothing in this option shall obligate the Company or any Affiliate of the
Company, or their respective shareholders, Board of Directors, officers, or
employees to continue any relationship which you might have as a Director or
Consultant for the Company or Affiliate of the Company.

      10.   NOTICES. Any notices provided for in this option or the Plan shall
be given in writing and shall be deemed effectively given upon receipt or, in
the case of notices delivered by the Company to you, five (5) days after deposit
in the United States mail, postage prepaid, addressed to you at the address
specified below or at such other address as you hereafter designate by written
notice to the Company.

<PAGE>

      11.   GOVERNING PLAN DOCUMENT. This option is subject to all the
provisions of the Plan, a copy of which is attached hereto and its provisions
are hereby made a part of this option, including without limitation the
provisions of Section 6 of the Plan relating to option provisions, and is
further subject to all interpretations, amendments, rules and regulations which
may from time to time be promulgated and adopted pursuant to the Plan. In the
event of any conflict between the provisions of this option and those of the
Plan, the provisions of the Plan shall control.

Dated the         day of       ,         .

                                           Very truly yours,

                                           _____________________________________
                                           Greg Hildebrand
                                           Director of Finance

                                           Duly authorized on behalf
                                           of the Board of Directors

ATTACHMENTS:

      Notice of Exercise

<PAGE>

                                                     Grant Date:
                                                     Number of Shares:
                                                     Exercise Price: $
                                                     Total Exercise Price: $

The undersigned:

      (a)   Acknowledges receipt of the foregoing option and the attachments
referenced therein and understands that all rights and liabilities with respect
to this option are set forth in the option and the Plan; and

      (b)   Acknowledges that as of the date of grant of this option, it sets
forth the entire understanding between the undersigned optionee and the Company
and its Affiliates regarding the acquisition of stock in the Company and
supersedes all prior oral and written agreements on that subject with the
exception of (i) the options previously granted and delivered to the undersigned
under stock option plans of the Company, and (ii) the following agreements only:

      NONE            _____________________________
                      (Initial)

      OTHER
                      _________________________________________
                      _________________________________________
                      _________________________________________

                                              __________________________________

                                              OPTIONEE

                                              Address: